Hot-air furnace



PATENTED SEPT. 20, 1904" J. H. MOSER.

HOT AIR FURNACE.

APPLICATION FILED AUG.27,1903.

4 SHEETSSHEE'F L NO MODEL.

PATENTED SEPT. 20, 1904,

J'. H. MOSER.

HOT AIR FURNACE.

APPLICATION FILED AUG.27,1903.

4 SHEETSSHEET 2.

N0 MODEL.

AW'J/ MV' Inventor 0522266; 177056;:

Witnesses Attorney No. 770,691. PATENTED SEPT. 20, 1904 J. H. MOSER.

HOT AIR FURNACE.

APPLICATION FILED AUG. 27. 1903.

NO'MODEL. 4 SHEETS-SHEET a.

Inventor 6% Attorney PATENTED SEPT. 20, 1904.

J. H. MOSER.

HOT AIR FURNACE.

APPLICATION FILED AUG. 27. 1903.

4 SHEETS-SHEET 4.

N0 MODEL.

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Hiiiiiiliilillliii'll HHHIIHHHH IIIHHHH IHIHHHHL Witnesses g g/aimAttorney V UNITED STATES PATENT Patented September 20, 1904.

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HOT-AIR FURNACE.

SPECIFICATION forming part of Letters Pat nt N0. 770,691, datedSeptember 20, 1904.

Application filed August 27, 1903. Serial No. 170,942. (No model.)

To all whom it may concern.-

Be it known that I, JAMES H ENRY MOSER, a citizen of the United States,residing at Parnassus, in the county of Westmoreland and State ofPennsylvania, have invented certain new and useful Improvements inHot-Air Furnaces; and I do declare the following to be a full, clear,and exact description of the invention, such as will enable othersskilled in the art to which it appertains to make and use the same.

My invention relates to new and useful improvements in furnaces, andmore particularly to a hot-air heating-furnace made up of sections, thenumber of which may be increased or decreased to vary the size of thefurnace.

The object of my invention is to provide a furnace of this characterwhich will be simple in construction, durable in use, efficient inoperation,and comparatively inexpensive to produce, and one which may bereadily enlarged or reduced in size.

A further object is to provide means for automatically regulating thecold air-inlet damper.

With these and other objects in view the invention consists of certainnovel features of construction, combination, and arrangement of parts,as will be more fully described, and particularly pointed out in theappended claim.

Figure 1 is a perspective view of my improved hot-air furnace. Fig. 2 isa vertical longitudinal sectional view through the same.

Fig. 3 is a horizontal sectional view. Fig. 4

is a vertical transverse sectional view. Fig. 5 is an inner sideelevation of one of the bodysections of the furnace.

In the embodiment of my invention, as illustrated in the drawings, thenumeral 1 denotes a furnace composed of two end pieces or sections 2 3and two or more body-sections 1, three of the latter being shown in thedrawings. Any number of said body-sections 4.,

rectangular body which forms the combustion-chamber of the furnace,hot-air boxes 6 upon each end of said body portion forming verticalair-heating channels or flues, and a connecting hot-air box at the topof said body portion forming a horizontal hot-air channel which connectssaid vertical channels and similar horizontal channels on adjacentsections. The front and rear sides of said body portion 5 are open andadapted to aline or register with the open sides of the adjacentsections or end ieces, so as to form a continuous chamber which extendsthrough the furnace from front to rear and in which the combustion ofthe fuel takes place and the smoke, gases, and other products ofcombustion circulate. In the body 5 above the closed bottom 8 of eachsection 4: is supported upon ribs 9 a grate 10, which forms an ash pitor chamber 11 below the same and a fire pot or box 12 above the same,said fire-box being lined by removable fire-walls 13, which are alsosupported by said ribs 9, and are held against the closed ends 14: ofthe body portion 5 of the body-sections by grooved ribs or lugs 15. Inthe upper portion of the body 5 above the fire-box 12 is acombustion-chamber 16, through which the smoke and other products ofcombustion circulate and in which is a vertical row of air-heating pipesor flues 17 disposed transversely and horizontally between the ends 14and affording communication between the vertical air-heating channels 6to permit the pure air in said channels to circulate and becomethoroughly heated. The lower ends of the channels 6 open into a coldairspace 18, formed below the furnace in the brick foundation 19, uponwhich it rests, and the upper ends of said channels communicate with thechannels in the upper connecting hot-air.boxes 7 at each end of thesame. In the outer wall of each of said boxes 6 on one side of thefurnace is formed an opening 20, adapted to receive a moisteningkettle21, comprising a ring or plate 22, adapted to close said opening andprovided with a suitable handle 23 and a water-receptacle 24:, dependingfrom said ring 22 and disposed within the box 6, as clearly shown inFig. 4:. The coldair space 18 beneath the furnace extends from front torear and at its rear end is in communication. with the usual cold-airinlet pipe. The front and rear sides of each of said boxes 7 areopen, so as to communicate with the open sides of the adjacent boxes oneither the sections 4 or the end pieces 2 and 3. In the tops of saidboxes 7 are formed openings having flanges or rings 25, to whichhot-air-register pipes are connected. The usual dampers 26 are providedin said rings to control the discharge of hot-air from the furnace.

The front end piece or section 2 is a hollow casting having a centralbody portion formed with hot-air boxes or channels at each end and atits top similar to the sections 4. The inner face or side of said frontend is open at two points to register with the openings formed in thesides of the sections 4, as clearly shown in Fig. 2, and the front sideor face of the same is closed except for the openings 27 and 28, formedin line with the fire-pot 12 and ash-pit 11 and closed by hinged doors29 and 30, which are provided with the usual draftdampers 31.Screw-plugs 32 close threaded openings 33, formed in the front side ofthe said front end piece 2, for a purpose hereinafter explained.

The rear end piece or section 3 is very similar to the front piece 2,the same having its inner face or side open at two places to communicate with the combustion-chamber and the upper hot-air box orchannel of the last or adjacent bodysection 4 and having its closed rearside or face provided with a flanged smoke-outlet opening 34, to which asmokepipe is attached to carry the products of combustion to a chimneyor smoke-stack.

The body sections 4 are adapted to be clamped between the end sectionsby passing tie bolts or rods 35 through alining apertures 36, formed inthe several sections. The said bolts have their heads secured to therear end piece or section 3 and extend forwardly, having their frontscrew-threaded ends 37 in line with the openings 33 in the front endpiece 2. Nuts 38 are screwed upon said threaded ends 37 to bind theseveral sections firmly together, a Wrench being inserted through theopenings 33, as indicated by the dotted lines in Fig. 2, to apply orremove said nuts from the bolts.

In order to effect a smoke and air tight joint 1 or connection betweenthe sections, the meeting faces of each of the sections are formed withgrooves 39, which extend around the openings formed in the same and areadapted to receive a packing 40 in form of pliable wires, which areclamped between the grooves of two adjacent sections. it will be seenthat these wires will allow for the expansion and contraction of thesections and effectivelyv prevent the escape of air, smoke, or anyproducts of combustion.

In order to automatically regulate the amount of cold air passing intothe furnace, so that the air discharged from the various registersthroughout the house or building in which the furnace is located andinoperation is always warm notwithstanding the condition of the fire, Icontrol the usual pivoted damper 40, located in the cold-air-inlet pipe,by a thermostatic regulating device, which comprises a thermostatic bar41, which is disposed in the upper portion of the fire-pot 12, extendingfrom front to rear. The front end of said expansible bar 41, which ispreferably of iron, is fixed in the front fire-wall and the rear end ofthe same extends through the rear end piece 3 and is provided with-aregulating or adjusting screw 42, which is adapted to engage the shorterarm of a lever 43, pivoted at 44 to a bracket on the rear end piece 3.The longer and lower arm of said lever 43 is pivotally connected by alink 45 to a crankarm 46 on the shaft 47, which pivots the damper 40 inthe cold-air-inlet pipe. The variation of the length of the bar 41,dueto its expansion and contraction under the changes of temperature inthe fire-box, will operate the lever 43 to open or close the damper 40,as will be readily understood. When there is no fire in the fire-pot,the parts will assume the full-line position (shown in Fig. 2) and thedamper 40 will be closed, thus preventing cold air passing through thefurnace and into the building. When there is a fire in the furnace theparts will be moved to the dottedline position (shown in Fig. 2) andopen the damper. By means of the screw 42 the length of the bar 41 maybe varied to regulate the opening and closing of the damper.

The operation of my improved furnace will be readily understood from theforegoing description, taken in connection with the accompanyingdrawings. It will be seen that the heat, smoke, gases, and otherproducts of combustion from the fire on the grates 10 will circulatethrough the combustion-chamber formed by the several body-sections ofthe furnace and about the pipes 17 in said chamber, and then dischargeto the chimney or smoke-stack through the opening 34 and its attachedsmoke pipe. The pure cold air which may be conveyed from any desiredpoint through the cold-air-inlet pipe passes through the space 18 underthe furnaces and enters the lower ends of the vertical fines or channelsformed by the boxes 4. As it passes up through said flues and circulatesthrough the transverse flues 17, it becomes thoroughly heated by contactwith the same, and then passes into the horizontal fiues or channelsformed by the boxes 7, from which it is discharged through the openings25 into pipes, which convey it to the registers.

It will be seen that my furnace is very simple in construction, andhence comparatively inexpensive to manufacture. Since the furnace ismade almost entirely of castings, it is extremely strong and-durable,and the large amount of heating-surface renders the same very efficientin operation. By building the furnace in sections and uniting them aspreviously described the furnace may be made larger or smaller, asdesired, in a simple, easy, and inexpensive manner.

From the foregoing description, taken in connection with theaccompanying drawings, the construction and operation of the inventionwill be readily understood without requiring a more extendedexplanation.

Various changes in the form, proportion, and the minor details ofconstruction may be resorted to without departing from the principle orsacrificing any of the advantages of this invention.

Having thus fully described my invention, what I claim, and desire tosecure by Letters Patent, is

A hot-air heating-furnace comprising a plurality of intermediatebody-sections, each having a chamber spaced from the sides thereof,closed at its sides, top and bottom, providing an ash-pit section, afire-box section and a combustion-chamber section, each open at its endsto communicate with a fellow section, said chamber of each intermediatebodysection providing vertical air-passages at its sides, open at theirlower ends for the admission of air to the heaters, a transverseairheating passage connecting the upper ends of the vertical air-heatingpassages, above the combustion-chamber and having heated-airdischargingmeans, each of said intermediate sections being further provided withtransverse air-heating passages in the combustionchamber connecting thevertical air-heating passages, front and rear end sections, having theirupper ends communicating with the upper transverse air-passages of theintermediate sections and having their lower ends open, said frontsection being further provided with passages communicating respectivelywith the fire-box and ash-pit formed by the several intermediatesections, means to detachably secure the intermediate and end sectionstogether, and an air-inlet chamber at the base of the furnace,communicating with the lower ends of the end sections and the lower endsof the vertical air-passages of the several intermediate sections,substantially as described.

In testimony whereof I have hereunto set my hand in presence of twosubscribing witnesses.

, JAMES HENRY MOSER. Witnesses:

BIRTMAN R. RoNAM, ROBERT BARNETT.

